220112012210021 has 2 divisors, whose sum is σ = 220112012210022. Its totient is φ = 220112012210020.

The previous prime is 220112012210009. The next prime is 220112012210107. The reversal of 220112012210021 is 120012210211022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154407613279396 + 65704398930625 = 12426086^2 + 8105825^2 .

It is a cyclic number.

It is not a de Polignac number, because 220112012210021 - 2³⁴ = 220094832340837 is a prime.

It is a super-2 number, since 2×220112012210021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220112012210621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110056006105010 + 110056006105011.

It is an arithmetic number, because the mean of its divisors is an integer number (110056006105011).

Almost surely, 2^{220112012210021} is an apocalyptic number.

It is an amenable number.

220112012210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220112012210021 is an equidigital number, since it uses as much as digits as its factorization.

220112012210021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 220112012210021 its reverse (120012210211022), we get a palindrome (340124222421043).

The spelling of 220112012210021 in words is "two hundred twenty trillion, one hundred twelve billion, twelve million, two hundred ten thousand, twenty-one".